Panda, if you still have the seedhead, you can save the seeds for next year, if not watch out for self-sown seedlings close to the mother plant in late spring/early summer next year as they often come up in abundance.

They are very easy from seed. Let the seeds mature though. They look like little maggots. Very stragne seeds for a small flower when you compare them to Corn marigolds or oxe-eye-daisy of a similar size.